1 /*  This file is part of the KDE project.

     2 

     3     Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 

     5     This library is free software: you can redistribute it and/or modify

     6     it under the terms of the GNU Lesser General Public License as published by

     7     the Free Software Foundation, either version 2.1 or 3 of the License.

     8 

     9     This library is distributed in the hope that it will be useful,

    10     but WITHOUT ANY WARRANTY; without even the implied warranty of

    11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    12     GNU Lesser General Public License for more details.

    13 

    14     You should have received a copy of the GNU Lesser General Public License

    15     along with this library.  If not, see <http://www.gnu.org/licenses/>.

    16 */

    17 

    18 #ifndef Phonon_GSTREAMER_BACKEND_H

    19 #define Phonon_GSTREAMER_BACKEND_H

    20 

    21 #include "common.h"

    22 #include "devicemanager.h"

    23 #include "medianode.h"

    24 

    25 #include <phonon/objectdescription.h>

    26 #include <phonon/backendinterface.h>

    27 

    28 #include <QtCore/QList>

    29 #include <QtCore/QPointer>

    30 #include <QtCore/QStringList>

    31 #include <QtCore/QTimer>

    32 

    33 #include <gst/gst.h>

    34 

    35 QT_BEGIN_NAMESPACE

    36 

    37 namespace Phonon

    38 {

    39 namespace Gstreamer

    40 {

    41 class AudioOutput;

    42 class MediaNode;

    43 class MediaObject;

    44 class EffectManager;

    45 

    46 class Backend : public QObject, public BackendInterface

    47 {

    48     Q_OBJECT

    49     Q_INTERFACES(Phonon::BackendInterface)

    50 

    51 public:

    52 

    53     enum DebugLevel {NoDebug, Warning, Info, Debug};

    54     Backend(QObject *parent = 0, const QVariantList & = QVariantList());

    55     virtual ~Backend();

    56 

    57     DeviceManager* deviceManager() const;

    58     EffectManager* effectManager() const;

    59 

    60     QObject *createObject(BackendInterface::Class, QObject *parent, const QList<QVariant> &args);

    61 

    62     bool isValid() const;

    63     bool supportsVideo() const;

    64     QStringList availableMimeTypes() const;

    65 

    66     QList<int> objectDescriptionIndexes(ObjectDescriptionType type) const;

    67     QHash<QByteArray, QVariant> objectDescriptionProperties(ObjectDescriptionType type, int index) const;

    68 

    69     bool startConnectionChange(QSet<QObject *>);

    70     bool connectNodes(QObject *, QObject *);

    71     bool disconnectNodes(QObject *, QObject *);

    72     bool endConnectionChange(QSet<QObject *>);

    73 

    74     DebugLevel debugLevel() const;

    75 

    76     void addBusWatcher(MediaObject* node);

    77     void removeBusWatcher(MediaObject* node);

    78     void logMessage(const QString &message, int priority = 2, QObject *obj=0) const;

    79     bool checkDependencies() const;

    80 

    81 Q_SIGNALS:

    82     void objectDescriptionChanged(ObjectDescriptionType);

    83 

    84 private Q_SLOTS:

    85     void handleBusMessage(Message);

    86 

    87 private:

    88     static gboolean busCall(GstBus *bus, GstMessage *msg, gpointer data);

    89     QList<QPointer<AudioOutput> > m_audioOutputs;

    90 

    91     DeviceManager *m_deviceManager;

    92     EffectManager *m_effectManager;

    93     DebugLevel m_debugLevel;

    94     bool m_isValid;

    95 };

    96 }

    97 } // namespace Phonon::Gstreamer

    98 

    99 QT_END_NAMESPACE

   100 

   101 #endif // Phonon_GSTREAMER_BACKEND_H